From 1798 she made four complete voyages as a slave ship in the triangular trade in enslaved persons.

[1] 1st slave voyage (1798–1799): Captain Daniel Hayward acquired a letter of marque on 25 June 1798.

[4] 3rd slave voyage (1801–1802): Captain Michael Mills acquired a letter of marque on 10 April 1801.

[7] A strong gale stranded Active, Mills, master, from Tobago for the Clyde, on 24 January 1804 at Brodick Bay, on the Isle of Arran.

It was expected that if the weather continued to moderate, a considerable part of her cargo could be saved, if not the vessel herself.

[8] another report stated that the Guineaman was a complete wreck and that only a few tons of elephant teeth, 47 puncheons of rum, and some wood would be saved.

[9] 5th slave voyage (1805–loss): Active was saved and repaired as Captain Mills sailed her from Liverpool on 7 February 1805.

Active was among the seven vessels off the Congo River that had fallen prey to a privateer in late 1805.

[12] Spanish records report that in June 1805, Viceroy Sobremonte, of Argentina, issued two letters of marque, one for Dolores (24 guns), Currand, master, and Berro y Errasquin, owner, and one for Dromedario (20 guns), Hippolito Mordel, master, and Canuerso y Masini, owner.

In three months of cruising Dolores captured three ships and one brig, carrying a total 600 enslaved people.